INDEX. 



37i 



Stars (continued) 

 triple, 130 

 number of, 248, 254 

 suns, 251-253 



extent of starry space, 255, 304 

 light of 18,000 years ago, 260 

 no "fixed," 264 

 change of groupings, 264 

 movements in space, 267 

 motion and spectroscope, 268- 



272 

 photography of, 292-318 



invisible, 300, 301 

 Star-worship, 200 

 Sun, attraction of, and the earth, 



2,5 

 heat-supply constant, 3, 5, 6 



expenditure of heat, 7-9, 



11, 16 

 elements common to it and 



earth, 19 

 the " fuel " problem, 6, 7, 24, 



25 



not explained by chemical ac- 

 tion, 17-20 

 nor by mechanical, 21 

 true explanation, 24-34 

 dimensions of, compared with 



earth's, 12 

 density of, compared with 



earth's, 25 



prominence of, corona, 14 

 rotation of, 53 

 influx of meteors, 21-23 

 temperature and radiation, 



30-32 

 future of, ultimate dark and 



cold, 35, 36 



nebular origin, 39, 46, 346-b 

 pre-nebular stage, 47, 48 

 what we owe to the, 40 

 tidal action, 75 

 heat of, on Jupiter, 191-193 

 Janssen's photograph* of, 295 



Sunbeams and magnetic needle, 

 out of cucumbers, 41, 42 

 pre-historic in coal, 44 

 all artificial light due to, 45 

 and water power, 46 



Swift, Dean, his guesses, 41, 179 



TELESCOPE and the moon, 83, 84 

 range of vision, 256-258 



Tidal action on earth, 63, 74-75 

 on moon, 58, 62, 63 

 on Venus and Mercury, 147- 

 148 



Transit of Venus, 158 



Tycho Brahe, 98 



U 

 UNITY, material, of universe. 263 



VEGA, light-distance of, 269 



Venus and Mars, 141 



Galileo's view of, 141 

 heat, light, atmosphere, 143 

 rotation, length of day, 144 



145 



Schiaparelli' s observations, 147 

 one face to the sun, 147 

 tidal action on, 148 

 transit of, 158 



W 



WATER in the moon, 85 

 "Weights on the moon, 94 

 Weighing planets, 115, 172-179 

 Women and astronomical work, 97 

 169 



ZEBO of longitudes on Mars, 161 



Printed by Str Isaac Pitman 

 (2190) 



Sons, Ltd., Bath. 



